Circuit-closer.



E. FLANAGAN.

CIRCUIT CLOSER.

v APPLICATION FlLED lAN.15,1913.

Patented Jan 11, 1916.

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wi tmmoeo THE COLUMBIA PLANOGRAPH c0., WASHINGTON, D. c

- UNITED STATES PATENT oFFioE.

EDWARD FLANAGAN, OF PHILADELPHIA, PENNSYLVANIA.

Application filed January 15', 1913.

To all whom it may-concern:

Be it known thatI, EDWARD FLANAGAN, citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in Circuit- Closers, of which the following is a specification.

This invention relates to circuit closers for thermostatic fire alarm systems and has for its primary object, the provision of a circuit closer the movable portion of which is actuated by thermostatic devices acted upon by heat.

An object of the invention is to provide a circuit closer including a slidably mounted weight normally held in an elevated position by a thermostatic element and adapted upon descension to close a signal circuit.

The invention consists in the features of construction, combination, and arrangement of parts, hereinafter fully described and claimed, reference being had to the accompanying drawings, in which:

Figure 1 is a view illustrating the appli cation of'my invention. Fig. 2 is a side elevation of a circuit closer when in an inoperative position. Fig. 3 1s a similar View to Fig. 2 showing the device in an operative position.v

Referring to the drawings, the numeral 38 designates vertically spaced brackets secured to a suitable support. Connecting the brackets together is a rod 37. Encircling the lower portion of the rod 37 and resting upon the lower bracket 38 is a block of insulating material having embedded therein a pair of contacts 16 and 17, the latter. being fixed while the former is mounted for sliding movement. The contact 16 is provided with a finger 18 normally Specification of Letters Patent.

CIRCUIT-CLOSER.

Patented Jan. 11, 1916.

Serial No. 742,257.

projecting beyond the block of insulating material so as to be struckby the weight 36 in its descension. Upon the weight 36 striking the finger 18, the contacts will be thrown intoengagement with each other for closing the signal circuit 19. The Weight 36 is held in an elevated position by means of the chain 34:, certain links of which designated by the numeral 33 are made of fusible material adapted to fuse upon the surrounding temperature reaching a predetermined degree. As illustrated in Fig. 1, this chain passes around a pulley 32 disposed at various positions around the structure to be protected. Also connected to the weight 36. .by means of the chains 20 is a valve 21 controlling the flow of fluid to the audible signal 39. The remaining chain 20 is shown connected to a second signal 40 of any well known form.

Having described my invention, what is claimed is:

In a fire alarm signal, a support, a pair of. vertically spaced brackets secured thereto, a vertical rod secured at its end to said brackets, a weight slidable on said rod, a fusible chain normally holding said weight in an elevated position, a block of insulation mounted upon the lower bracket and encircling said rod, and a pair of vertically arranged normally spaced contacts embedded in said block, one of said contacts projecting above said block in close proximity to said rod.

In testimony whereof I afiix my signature in presence of two witnesses.

EDWARD FLANAGAN.

lVitnesses:

HELEN G. DALEY, NORMA-N J. SMITH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

